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Tool 24 / Summarize

The point, without the rewrite.

A local extractive summarizer. It ranks the sentences already in your text, keeps the strongest ones, and returns them in the original order. Nothing is uploaded and nothing is invented.

  • Free to use
  • Extractive
  • Runs locally
Live workbench3 of 11 sentences
Extractive summary

Topic words driving the ranking

  • problem
  • teams
  • decisions
  • requires
  • second
  • work
  • across
  • budget

These are frequent content words with common English stopwords removed. They explain the ranking; they are not a topic model.

Why these sentences

Score rewards repeated topic words and readable length
  1. Sentence 17 content words · score 1.85

    Remote work changed the way small teams hire.

  2. Sentence 29 content words · score 1.36

    A company can now recruit a designer in Lisbon and an engineer in Nairobi without opening a second office.

  3. Sentence 86 content words · score 1.29

    The teams that do well treat writing as part of the work.

3 sentences kept11 of69% shorter by22 content words keptExtractive · never uploaded

What it does

Paste an article, a report, a set of meeting notes, or a long transcript. The tool breaks the text into sentences, measures which content words repeat, and gives each sentence a score. It then keeps a requested number of sentences — either a percentage of the source or a fixed count — and puts the winners back in the order they appeared.

That is the whole operation. There is no hidden prompt, no model provider, and no assistant writing a new paragraph. The output is a shorter version of your own text, assembled from sentences you can find in the input. If a sentence is not in the source, it cannot appear in the summary.

The workbench also shows the topic words that influenced the ranking and a short “why these sentences” list with a score for each kept sentence. Those details matter: a summary is easier to trust when you can see what the selector was optimising for. They are not a claim that the ranking understands the argument.

How sentences are ranked

The scorer starts by lowercasing the text and splitting it into word tokens. It removes a built-in list of common English stopwords — words such as “the”, “and”, “of”, and “that” — and applies a light stemming step so that simple variants such as “report” and “reports” count as the same term. It then counts how often each remaining term appears across the whole text.

A sentence receives credit for containing frequent content words, but the score is divided by sentence length so a long sentence cannot win merely by having more words. A small position bonus favours the opening sentences, and very short or extremely long sentences are damped. After ranking, the tool compares candidate sentences with the ones already selected. If two sentences are too similar, the later one is skipped so the summary does not spend its budget repeating the same point.

This is a frequency-and-position ranker, not a neural summarizer and not a full TextRank implementation. It is deterministic: the same text and settings produce the same result. That predictability is useful when you want to compare two drafts, but it also means the tool has no idea which claim is true, which caveat matters, or which sentence is the actual thesis.

Choosing a length

The length control is a request, not a guarantee of quality. A percentage is useful when the source is long and you want a predictable ratio: 20–30% is a practical starting range for an article or report. Five to eight sentences is a reasonable target for a one-page brief or a quick read of meeting notes. For a very long document, 10% may still produce a useful triage summary.

Start short. Read the result against the source and ask a simple question: is the sentence that carries the main point present? If not, raise the length or choose the sentence-count mode and add two or three sentences. A summary that contains every minor detail is not a summary; it is the document with extra steps.

Short inputs are handled conservatively. If the source has only two sentences, both are kept. If the requested count is larger than the number of sentences, the tool returns all of them rather than padding the output. When near-duplicate sentences are skipped, a second pass fills the target from the remaining highest-ranked sentences, so the count is honoured whenever the source has enough distinct material.

Extractive, not generative

Generative summarizers can smooth a source into a new paragraph. They can merge two ideas, replace a clumsy phrase, and add a transition that was never there. They can also invent a number, reverse a caveat, or confidently state something the source does not say. This tool makes the opposite trade. It is limited, literal, and auditable.

The practical consequence is that the output may sound uneven. A selected sentence can begin with “However” even though the sentence it referred to was not selected. A pronoun can point at a noun that stayed behind. The summary is a set of signposts back to the source, not a replacement for it. For a legal document, a medical note, or a financial report, that limitation is a feature: every sentence can be checked in context.

Use the result for triage, for a first pass over a long document, or for extracting candidate sentences that you will edit by hand. Do not present it as an abstract you have not read against the original.

Examples

A project update
Three sentences kept from seven

Before

The pilot began in March with two support teams. Average first-response time fell from nine minutes to six. The team handled 18 percent more tickets without adding headcount. The improvement was largest during the Monday morning peak. The pilot cost less than expected because it reused the existing dashboard. The operations lead recommended extending it to the billing team in July.

After

The pilot began in March with two support teams. The team handled 18 percent more tickets without adding headcount. The operations lead recommended extending it to the billing team in July.

The selected sentences cover the setup, the measurable result, and the recommendation. The sentence about the Monday peak and the sentence about cost are plausible details, but they are not the spine of the update. A different length setting could include them.

A paragraph with a repeated structure
The opening questions are kept because they carry the topic

Before

A good changelog answers three questions. What changed? Who does it affect? What should the reader do next? Most changelogs answer the first question and stop. They list merged pull requests and internal ticket numbers, which are useful to the team that shipped the work but not to the person using the product. A better entry names the user-visible change, states whether it is a fix or a new behaviour, and links to the detail only when the reader needs it.

After

A good changelog answers three questions. What changed? Who does it affect? What should the reader do next? A better entry names the user-visible change, states whether it is a fix or a new behaviour, and links to the detail only when the reader needs it.

The three short questions survive because “changelog”, “changed”, and “reader” recur in the paragraph and the questions are not long enough to be penalised. This is a useful reminder that frequency scoring rewards repetition, not rhetorical importance. If the questions were buried in the middle and mentioned once, the result would be different.

Limits worth knowing

  • Sentence splitting is heuristic. The splitter looks for terminal punctuation and trims each sentence. Abbreviations, decimals, ellipses, and missing punctuation can create a bad boundary, and no splitter is perfect.
  • Frequency is not understanding. A sentence that states the main point once may lose to a sentence that repeats a side issue four times. Negation is especially fragile: “the policy does not apply” and “the policy applies” share most of their words.
  • Stopwords are English. In another language, the keyword table may still contain common grammatical words, and the ranking will be weaker. The punctuation and sentence rules are also oriented toward English prose.
  • The source is capped at 200,000 characters. That is generous for an article or a report, but it is not a book-length tool. A very large paste can also make the browser work hard; shorten the source or work in sections.
  • Nothing is stored. The text lives in the page while it is open. Copy the summary before you leave, because a refresh clears both the input and the output.

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Questions, answered

Is this an AI summarizer?

It is an algorithmic extractive summarizer, not a language model. It splits the text into sentences, scores them using repeated content words and position, filters near-duplicates, and returns the highest-ranked sentences. There is no generation step and no API call.

Does it rewrite or paraphrase my text?

No. Every sentence in the output already exists in your input. The tool may choose sentences, but it never edits their wording, rearranges their clauses, or adds a conclusion. That is the main trade-off: the result can sound less polished than a generative summary, but it cannot invent a fact.

Can it summarize a single paragraph?

Yes, but the useful ceiling is low. A paragraph with two or three sentences usually comes back almost unchanged, because there are few sentences to choose from. The tool is more useful on an article, a report, a transcript, or a set of meeting notes where the important points are spread across many sentences.

How do I choose a percentage or a sentence count?

Use a percentage when you want a predictable compression ratio, such as 25% of a long article. Use a sentence count when you need a specific size, such as five sentences for an executive note. Start smaller than you think you need, read the result, then raise the number if a key point is missing.

Why is the summary in a different order than the ranking?

By default, selected sentences are put back into their original order. A summary that follows the source is easier to trust and easier to check against the original. Turn off “Keep the original sentence order” if you want the highest-scoring sentences first instead.

Is my text uploaded?

No. The summarizer runs entirely in this browser tab. There is no server endpoint, no account, no analytics call, and no stored copy. Refreshing or closing the page discards the text.

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